Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The ai.h2o:h2o-core package, versions up to and including 3.46.0.4, is vulnerable to deserialization of untrusted data. An attacker who can supply a crafted model file, which H2O then imports, can use Java gadget classes to run arbitrary code, since model deserialization does not restrict which classes may be loaded. The source gives no fixed version, so no fix is listed; avoid importing models from untrusted sources.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | CNA (JFROG) |
- CISA KEV Not listed.
- EPSS 0.0068, the 53rd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:13 UTC First seen by agentprime
- 31 Oct 2026, 15:13 UTC Confirmed by OSV